Pavilion 500: HP500-326na does not start... not the power of USB devices

Three days of warranty expirition my HP Pavilion 500 turned off and will not start.

The led on the back of the case is on.

The led on the motherboard is on.

Fans for the processor and the case work.

There is no power to any USB port... so without mouse and keyboard.

There is no signal on the screen.

The power switch will not shut the unit, regardless of how long you hold in.

There is no beeps on the motherboard at startup.

I cleaned the dust.

I have disconnected all drives and plugged back in one at a time.

I deleted the memory chips vivid and re-sitting them.

I removed the graphics card and re-sitting there.

All to nothing does not.

There is no way to run diagnostics or tests with a mouse and a keyboard.

What else can be done to determine the case of this problem?

Thank you.

So if you had followed this document and still has not changed, the only thing left is to contact the helpline.

Please use the following http://www.hp.com/contacthp and create a folder for your question and contact HP. If you do not live in the United States / Canada, please click on the link below to get contact information for your region. http://WWW8.HP.com/us/en/contact-HP/WW-phone-assist.html

Tags: HP Desktops

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